Subaru LEGACY 2003 Service Manual page 254

DIAGNOSTICS CHART WITH SELECT MONITOR
VDC (DIAGNOSTICS)
7 CHECK GROUND CIRCUIT OF VDCCM.
1) Disconnect connector from VDCCM.
2) Remove cover from VDCCM connector.
<Ref. to VDC-19, VDCCM Connector
Cover.>
3) Connect connector to VDCCM.
4) Measure resistance between VDCCM and
chassis ground.
Connector & terminal
(F87) No. 64 — Chassis ground:
Is the measured value less than the speci-
fied value?
8 CHECK POOR CONTACT IN CONNECTORS.
Is there poor contact in VDCCM connector?
9 CHECK HARNESS OF YAW RATE AND LAT-
ERAL G SENSOR.
1) Disconnect connector from VDCCM.
2) Measure resistance between VDCCM and
yaw rate and lateral G sensor.
Connector & terminal
(F87) No. 65 — (R100) No. 4:
(F87) No. 66 — (R100) No. 1:
(F87) No. 67 — (R100) No. 2:
Is the measured value less than the speci-
fied value?
10 CHECK GROUND SHORT OF HARNESS.
Measure resistance between VDCCM and
chassis ground.
Connector & terminal
(F87) No. 65 — Chassis ground:
(F87) No. 66 — Chassis ground:
(F87) No. 67 — Chassis ground:
Does the measured value exceed the specified
value?
11 CHECK BATTERY SHORT OF HARNESS.
Measure voltage between VDCCM and chas-
sis ground.
Connector & terminal
(F87) No. 65 (+) — Chassis ground ( − − − − ):
(F87) No. 66 (+) — Chassis ground ( − − − − ):
(F87) No. 67 (+) — Chassis ground ( − − − − ):
Is the measured value less than the specified
value?
12 CHECK BATTERY SHORT OF HARNESS.
1) Turn ignition switch to ON.
2) Measure voltage between VDCCM and
chassis ground.
Connector & terminal
(F87) No. 65 ( + + + + ) — Chassis ground ( − − − − ):
(F87) No. 66 ( + + + + ) — Chassis ground ( − − − − ):
(F87) No. 67 ( + + + + ) — Chassis ground ( − − − − ):
Is the measured value less than the speci-
fied value?
Step Value
0.5 Ω
There is poor contact.
0.5 Ω
1 MΩ
0.5 V
0.5 V
VDC-252
Yes
Repair harness Go to step 8.
between yaw rate
and lateral G sen-
sor and VDCCM.
Repair or replace Replace VDCCM.
VDCCM connec- <Ref. to VDC-8,
tor. VDC Control Mod-
ule (VDCCM).>
Go to step 10. Repair harness
between yaw rate
and lateral G sen-
sor and VDCCM.
Go to step 11. Repair harness
between yaw rate
and lateral G sen-
sor and VDCCM.
Go to step 12. Repair harness
between yaw rate
and lateral G sen-
sor and VDCCM.
Go to step 13. Repair harness
between yaw rate
and lateral G sen-
sor and VDCCM.
No